Computation Of Basic And Diluted Earnings Per Common Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income from continuing operations attributable to common shareholders	$ 14,024	$ 1,428	$ 35,040	$ 17,772
Denominator for basic earnings per share-weighted average shares	29,474,866	27,593,338	29,047,998	27,563,536
Effect of Dilutive Securities:
Stock options, warrants and non-vested stock	149,000	41,000	120,000	44,000
Denominator for diluted earnings per share-adjusted weighted average shares and assumed conversion	29,624,311	27,634,029	29,167,681	27,607,567
Basic earnings per common share from continuing operations attributable to common shareholders	$ 0.48	$ 0.05	$ 1.20	$ 0.64
Basic earnings per common share attributable to common shareholders	$ 0.64	$ 0.08	$ 1.43	$ 0.74
Diluted earnings per common share from continuing operations attributable to common shareholders	$ 0.47	$ 0.05	$ 1.20	$ 0.64
Diluted earnings per common share attributable to common shareholders	$ 0.63	$ 0.08	$ 1.43	$ 0.74